Package org.goplanit.utils.math

Class Precision

java.lang.Object

org.goplanit.utils.math.Precision

public class Precision
extends Object

compare doubles with a certain precision

Author:

markr

Field Summary

Fields

Modifier and Type	Field	Description
static DecimalFormat	DEFAULT_DECIMAL_FORMAT	default decimal format used applies a maximum of 8 decimals and a minimum of 2
static double	EPSILON_12
static double	EPSILON_15
static double	EPSILON_18
static double	EPSILON_3
static double	EPSILON_6	the default Epsilon unless indicated otherwise
static double	EPSILON_9

Constructor Summary

Constructors

Constructor	Description
Precision()

Method Summary

Modifier and Type	Method	Description
static boolean	isEqual(double d1, double d2)	Compare using a Precision.EPSILON_6
static boolean	isEqual(double d1, double d2, double epsilon)	Compare using a custom precision epsilon
static boolean	isGreater(double d1, double d2)	isGreater with Precision.EPSILON_6
static boolean	isGreater(double d1, double d2, double epsilon)	isGreaterEqual with epsilon
static boolean	isGreaterEqual(double d1, double d2)	isGreaterEqual with Precision.EPSILON_6
static boolean	isGreaterEqual(double d1, double d2, double epsilon)	isGreaterEqual with epsilon
static boolean	isNotEqual(double d1, double d2)	Opposite of isEqual(double, double)
static boolean	isPositive(double d1)	Verify if positive with Precision.EPSILON_6
static boolean	isSmaller(double d1, double d2)	isSmaller with Precision.EPSILON_6
static boolean	isSmaller(double d1, double d2, double epsilon)	isSmaller with epsilon
static boolean	isSmallerEqual(double d1, double d2)	isSmallerEqual with Precision.EPSILON_6
static boolean	isSmallerEqual(double d1, double d2, double epsilon)	isSmallerEqual with epsilon

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

EPSILON_18

public static final double EPSILON_18

See Also:

Constant Field Values

EPSILON_15

public static final double EPSILON_15

See Also:

Constant Field Values

EPSILON_12

public static final double EPSILON_12

See Also:

Constant Field Values

EPSILON_9

public static final double EPSILON_9

See Also:

Constant Field Values

EPSILON_6

public static final double EPSILON_6

the default Epsilon unless indicated otherwise

See Also:

Constant Field Values

EPSILON_3

public static final double EPSILON_3

See Also:

Constant Field Values

DEFAULT_DECIMAL_FORMAT

public static final DecimalFormat DEFAULT_DECIMAL_FORMAT

default decimal format used applies a maximum of 8 decimals and a minimum of 2

Constructor Detail

Precision

public Precision()

Method Detail

isEqual

public static boolean isEqual(double d1,
                              double d2,
                              double epsilon)

Compare using a custom precision epsilon

Parameters:

d1 - double1

d2 - double2

epsilon - epsilon value

Returns:

true when equal within epsilon, false otherwise

isEqual

public static boolean isEqual(double d1,
                              double d2)

Compare using a Precision.EPSILON_6

Parameters:

d1 - double1

d2 - double2

Returns:

true when equal within epsilon, false otherwise

isSmallerEqual

public static boolean isSmallerEqual(double d1,
                                     double d2,
                                     double epsilon)

isSmallerEqual with epsilon

Parameters:

d1 - double1

d2 - double2

epsilon - epsilon value

Returns:

true when d1 <= (d2 + epsilon)

isSmaller

public static boolean isSmaller(double d1,
                                double d2)

isSmaller with Precision.EPSILON_6

Parameters:

d1 - double1

d2 - double2

Returns:

true when (d1 + epsilon) < d2

isSmaller

public static boolean isSmaller(double d1,
                                double d2,
                                double epsilon)

isSmaller with epsilon

Parameters:

d1 - double1

d2 - double2

epsilon - epsilon value

Returns:

true when (d1 +epsilon) < d2

isSmallerEqual

public static boolean isSmallerEqual(double d1,
                                     double d2)

isSmallerEqual with Precision.EPSILON_6

Parameters:

d1 - double1

d2 - double2

Returns:

true when d1 <= (d2 + epsilon)

isGreaterEqual

public static boolean isGreaterEqual(double d1,
                                     double d2,
                                     double epsilon)

isGreaterEqual with epsilon

Parameters:

d1 - double1

d2 - double2

epsilon - epsilon value

Returns:

true when d1 >= (d2 - epsilon)

isGreaterEqual

public static boolean isGreaterEqual(double d1,
                                     double d2)

isGreaterEqual with Precision.EPSILON_6

Parameters:

d1 - double1

d2 - double2

Returns:

true when d1 >= (d2- epsilon)

isGreater

public static boolean isGreater(double d1,
                                double d2,
                                double epsilon)

isGreaterEqual with epsilon

Parameters:

d1 - double1

d2 - double2

epsilon - epsilon value

Returns:

true when (d1 - epsilon) > d2

isGreater

public static boolean isGreater(double d1,
                                double d2)

isGreater with Precision.EPSILON_6

Parameters:

d1 - double1

d2 - double2

Returns:

true when (d1 - epsilon) > d2

isPositive

public static boolean isPositive(double d1)

Verify if positive with Precision.EPSILON_6

Parameters:

d1 - double 1

Returns:

true when d1 > EPSILON_6

isNotEqual

public static boolean isNotEqual(double d1,
                                 double d2)

Opposite of isEqual(double, double)

Parameters:

d1 - to use

d2 - to use

Returns:

true when not equal, false otherwise